EP 2484021 A1 20120808 - CONCATENATING PRECODER SELECTION FOR OFDMA-BASED MULTI-BS MIMO
Title (en)
CONCATENATING PRECODER SELECTION FOR OFDMA-BASED MULTI-BS MIMO
Title (de)
VERKNÜPFUNG EINER VORCODIERERAUSWAHL FÜR MULTI-BS-MIMO AUF OFDMA-BASIS
Title (fr)
CONCATÉNATION DE SÉLECTION DE PRÉCODEUR POUR UN SYSTÈME ENTRÉES MULTIPLES/SORTIES MULTIPLES À STATIONS DE BASE MULTIPLES BASÉE SUR UN ACCÈS MULTIPLE PAR RÉPARTITION ORTHOGONALE EN FRÉQUENCE
Publication
Application
Priority
- US 24799309 P 20091002
- US 25517109 P 20091027
- US 92463210 A 20101001
- CN 2010077582 W 20101008
Abstract (en)
[origin: US2011080901A1] A method of concatenating precoder selection is provided for OFDMA-based multi-BS multiple-input multiple-output (MIMO). A cell-edge mobile station first determines a precoding matrix indexes (PMIs) for a serving base station and one or more cooperative base stations to optimize system performance. The mobile station then determines a plurality of corresponding weight factors for each of the base stations to further optimize system performance. The mobile station recommends the selected PMIs and weight factors to the serving base station, which shares the PMIs and weight factors with the cooperative base stations. Each base station then applies precoding using the recommended PMIs and weight factors. The weight factors are quantized to reduce computation complexity and to facilitate information feedback. In one embodiment, the weight factors are determined based on a pre-defined 3-bit uniform phase quantization rule. The concatenated precoder leads to large performance gain without introducing high computation complexity.
IPC 8 full level
H04B 7/02 (2006.01); H04B 7/06 (2006.01); H04L 1/06 (2006.01); H04L 5/00 (2006.01); H04L 25/03 (2006.01)
CPC (source: EP US)
H04B 7/022 (2013.01 - EP US); H04B 7/0639 (2013.01 - EP US); H04L 25/03343 (2013.01 - EP US); H04L 1/06 (2013.01 - EP US); H04L 5/0007 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 2011080901 A1 20110407; US 8526413 B2 20130903; CN 102132502 A 20110720; CN 102132502 B 20131218; EP 2484021 A1 20120808; EP 2484021 A4 20151230; EP 2484021 B1 20170614; JP 2013511167 A 20130328; JP 5355795 B2 20131127; TW 201132020 A 20110916; TW I429216 B 20140301; WO 2011038699 A1 20110407
DOCDB simple family (application)
US 92463210 A 20101001; CN 2010077582 W 20101008; CN 201080002382 A 20101008; EP 10819928 A 20101008; JP 2012531228 A 20101008; TW 99133482 A 20101001